Multiple fuse



July17, 1923. 1.462.195

N. J. DOYLE MULTIPLE FUSE Filed Nov. 5. `191g() 7 i 37 l/ /5 2B 26 l :d l 36 ,5

Patented July 17, 1923.

UNITE NICHOLAS J". DOYLT., 0F BUFFALO, NEW YORK.

MULTIPLE FUSE.

Application filed November 6, 192C'. Serial No. 422,174.v

To all whom, t may concer/1L.'

Be it known that I, Niorroins J Doyen, a citizen of the United States of America, and a resident of the city ot Bul'lalo, county of Erie, and State oi N ew Yorlt, have invented certain new and useful improvements in lvlultiple Fuses, of which the following is a iull, clear, and exact description.

My device relates in general to blow out fuses in which a plurality or fuse members are provided and so arranged that they may be successively brought into the circuit, so that when one ruse member blows, a new one may be connectedwithout having to supply a new fuse.

The principal object or my invention has been to' provide a fuse of this nature which only one 'fuse element may be connected in a circuit at any one time.

Another object has been to so design the fuse that the size of fuse element which it contains may be seen from the exterior or the fuse without having to disas enble it, so that the underwriters may oe assured at larger i'use has not been inserted than that which is prescribed by them.

Furthermore, my fuse is so designed 'that the fuse elements are stamped om one piece of fuse material, thus obviating all soldering` or fastening oit connections, which might later become loose or broken.

lVIoreover, my fuse is simple and cheap to manufacture and may be easily relilled when all of the iiuse elements have been used.

My 'fuse is so designed that it may easily be adapted to different forms and types of fuse construction.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, o'i which:

Fig. 1 is a longitudinal, sectional elevation of my complete fuse. y.

Fig. 2 is transverse, sectional View ther-eer taken on line 2-2 of Fig. 1.

Fig. 3 is an exterior view showing one end of the fuse.

Fig. l is an end view or' the core showing the slot for the screw.

Fig. 5 is a fragmentary, sectional view of the same, showing the screw in position, taken on line 5 5 oi' Fig. t.

Fig. 6 is a sectional elevation oi" a inediied form oi Jfuse,

Fig. 7 is a sectional view thereof talten on line 7-7 of Fig. 6.

Fig. 8 shows my ruse adapted for use in connection with an Edison socket.

Fig. 9 is a side elevation or my fuse when provided with knife-shaped ends, thus adapting it ior use as a tuse of this type.

Reierring to Figs. 1 to 3 inclusive, 10 is the core or my ruse which is made preferably ot porcelain or other suitable insulating material. This core is provided with a plurality or inse spaces 11 which are arranged radially about the center of the core and which extend longitudinally therethrough. The fuse element 12 oit my device is preferably made from a stamping and is provided with a head 13 and a plurality of fuse menibers 1d which are bent and extend at right angles to the head 13. There are as many et those fr. members as there are spaces 11 formed in the core 10, and these members are disposed within the spaces 11. Each of the members is preferably provided with a reduced portion 15, near its center, which determines and conlines the point where the inse will blow. After the i'use element 12 with its ruse members 1e is assembled in position in the core 10, the portions of the spa 11, which are not occupied by the 'fuse members lll, are Jfilled preferably with asbestos powder or other insulating and lire proof material. This not only properly supports the members 1li, but also serves to absorb the arc when the 'fuse blows. The core 10 is provided with plurality of radial apertures 1G, equal in number to the number ci spaces 11 and each one registering and terminating at one oit the spaces 11 for purposes to bfx hereinafter described.

bolt is arranged at each end ot the core 10 oi y tleviceA l prefer to malte the bolts separable from the core and to attach them thereto by providing a radially arranged aperture lS near each end of the core and with a comparatively narrow slot 19 extending longitudinally -from the aperture 18 to the outer edge of the core. The aperture 1S and slot 19 extend beyond the center of the core, so that the bolt, when disposed therein will be arranged at the center or the core. Each of the bolts 17 is provided with a head 2O which fits into the aperture 18 and with a flattened portion 21 which lits into the slot 19. It will thus be seen that the bolts 17 are fastened in place by passin them through the aperture 18 and slot 19 in a radial direction, and that, when the bolts are thus fastened in position, they will be held in place against axial movement.

A metallic cap 22 is arranged at one end of the fuse and is provided with a central aperture which passes over the bolt 17 at that end. The bolt at this end ot the luse also passes through the center or head portion 13 of the fuse element 12 and is thus electrically connected thereto. A nut 23 is preferably passed over the outwardly eX- tending end of the bolt 17, whereby the cap 22 is held in position. Thiscap is preferably provided with a plurality of very small perforations 24 through which the gases from the burnt fuse may pass. These perfor-ations are so small, that, should a fuse member blow at this end of the device, the arc therefrom would not be permitted to pass there` through. The hub or central portion of the fuse element 12 is preferably stamped with the amperage which each of the members is designed to carry; and the cap is pro` vided with a view opening 25 which is ar` ranged in registering `position with this stamping, so that inspectors may easily see that the proper fuse element has been placed Within the fuse when it is refilled.

A cap 26 is arranged at the opposite end of the core 10 and passes over the bolt 17, at this end of the core, having a nut 23 disposed thereon and bearing against the cap. The shell of this cap 26 extends beyond the point on the core where the radial apertures 16 are provided, and the shell is also provided with a plurality or' apertures 27 which are in registering position with the aper` tures 16. A rotatable ring 28 is mounted upon the shell of the cap 26 and over the apertures 27 formed therein. This ring carries a plunger 29 which is engageable with any pair of registering apertures 27 and 16. The plunger is slidably mounted in a oke 430 and is provided with a` collar 31.

etween the collar 31 and the yoke 3() is arranged a spring 32 which keeps the plunger normally pressed toward the core. A knob 33 is provided at the outer end of the plung` er, whereby it may be withdrawn from anyone of the apertures. Inasmuch as the apertures 16 are arranged adjacent the spaces 11, it is obvious that the plunger 29 will engage with the fuse member 14 arranged under the pair of apertures 27 and 16 with which the plunger is engaged. It is obvious that by withdrawing the plunger and rotatn ing the ring 28, the plunger may be brought into registering position with another set of apertures 27 and 16 and thereby engage the fuse member 14 lying beneath this set of apertures.

In Figs. 6 and 7, where I show a modiied form ot device, 35 is the core, which is provided with longitudinal spaces or grooves 36 on its periphery, in place of the spaces 11 of the form above described. The fuse members 14 of the fuse element 12 are arranged to lie in these grooves or spaces, and an outer shell 37 of suitable insulating ina-- terial is passed over the core and fuse members 14. In other respects this luse is iden` 7 tical with the one hereinbeiore described.

So as to make my fuse adaptable lfor usc in connection with luse sockets and holders of the different types now in use., I provide a number of adapters which may bc attached to my fuse so as to change its application. These are shown in Figs. 3 and 9. In Fig. 8, the device is shown used as a fuse adapted to fit an Edison socket. 40 is the outer shell which is provided with the usual Edison socket screwthreads Iltending upwardly 'from the top oit this shell is a metallic arm 4l, liz-wing; a metallic ring member 42 arranged at right angles to it.

This ring member -is provided with a cer tral aperture 43 having its center coincident with the center oit the shell 4() and being of a size to permit the passage olf the cap 22 of my device. A sleeve 44, ol insulatiir'i material, is arranged within the shell l0 and extends up to the metallic ring 42. The insulating disc 45 at the bottom of the shell 40 has a central contact member 46, which is provided with a central screw-threaded aperture of the same size as the bolts 17. As will be clear from Fig. 8, my device is attached to this adapter by passing the end bearing the cap 22 down through the aperture 43 in the ring 42 and through the sleeve 44 to a point where the screw 17 contacts with the contact member 46. The device is then rotated, whereby thescrew is engaged with the contact member 46, and the parts are thereby held together. lhen the fuse has been screwed into position in this adapter, the sleeve of the cap 26 will contact with the ring member 42 and thus connect this end of the device with the exterior of the shell 49. As the screw 17 at the inner end of the device is connected with the central contact member of the shell, it will be seen that a complete circuit will be formed, between the shell and Contact member by my device.

Vhere my device is to be used. in connection with the fuse holders adapted to fuses having knife-shaped ends, I provide the adapters 50, shown in Fig. 9. Each of these adapters comprises a head 51 arranged to bear, one against each of the caps 22 and 26 and provided with a central screw-thread ed aperture 52 whereby they are secured to the screws 17 at the ends of the device. Ff

tending from the head 51 ot each of these adapters is a blade portion 53, which is arranged to pass between the spring clips of fuse holders, common and well known in fuses of this type.

Obviously, some modilications of the details herein shown and described may be rotatable about the core and engageable with any one of the members of the lfuse element.

2. A multiple use comprising an insulating core, having a plurality ott longitudinal spaces formed therein, a fuse element Atornied from a single piece o material and havinga plurality of integral fuse members, one ot such fuse members being arranged in each of the spaces of the core, and radially#C ranged spring-pressed index means rotatable about the core and engageable with any one of the members of the fuse element.

3. A multiple fuse comprising an insulating core having a plurality of longitudinal spaces formed therein, a multiple fuse element having one of its members arranged in each of the core spaces, a metallic head, connected with a fuse element, at one end of the core, a metallic head, insulated from the fuse element, at the other end of the core, a ring rotatably mounted on the lastmentioned head, and a plunger carried by the ring and engageable 'with any one or the members of the fuse element.

1l. A multiple fuse comprising an insulating core having a plurality of longitudinal spaces formed therein, a multiple Yfuse ele ment having one ol its members arrangeiil in each of the core spaces, the core being formed at each end with a radial hole and a radial slot, a screw having a. head and flattened portion i'itting the hole and slot, respectively, ot the core, and a metallicl cap at each end of the core, each secured in place by one of the screws.

In testimony whereof, I have hereunto signed my name.

NICHOLAS J. DOYLEh i l l l l l 

